BPK 142 Lecture Notes - Lecture 4: Gluteus Medius Muscle, Gluteus Minimus Muscle, Gluteus Maximus Muscle

• School: Simon Fraser University
• Department: Biomedical Physio & Kines
• Course: BPK 142
• Professor: Mike Walsh

Document Summary

Muscle cells: (fibers) cells that have the property of contractility which allows them to shorten and develop tension. Shape deltoid (triangular), trapezius, rhomboid, latissimus (wide) Action various muscle names include terms like flexor, extensor, adductor, pronator. Location tibialis anterior, intercostals, pectoralis major. Size relation gluteus maximus, gluteus medius, gluteus minimus: includes terms like brevis (short) and longus (long) Direction of fibers transversus (across) and rectus (straight) Fascicle: bundle of muscle fibers encased by the perimysium. Running parallel to long axis of muscle great range of motion, little strength. Inserting diagonally into tendon running length of muscle small range of motion, greater strength. Unipennate: all fasciculi on one side of a tendon (i. e. semimembranosus) Bipennate: fasciculi inserted on both sides of a tendon (i. e. rectus femoris) Multipennate: convergence of several tendons (i. e. deltoid) Longitudinal (strap): fasciculi run parallel to the long axis of muscle (i. e. rectus abdominus) Radiate: fibers fan out from one single attachment (i. e. pectoralis major)